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A novel voltage-control scheme for low-voltage DC-DC converters with fast transient recovery

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3 Author(s)
Hoi Lee ; Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong ; Mok, P.K.T. ; Wing-Hung Ki

This paper proposes a novel voltage-control scheme to improve the slow dynamic response of the conventional pulse-width-modulation (PWM) continuous-current-mode (CCM) voltage-programming DC-DC converter. By introducing a high-pass notch filter in the control loop of the conventional converter, the unity gain bandwidth of the loop gain is enhanced and the system Q value is decreased. To demonstrate the improvement in the transient response, voltage-programming PWM CCM DC-DC converters with both the conventional and the proposed control schemes are designed and simulated. Results show that the dynamic response has 10 times improvement

Published in:

Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on  (Volume:1 )

Date of Conference:

2000